結果

問題 No.274 The Wall
ユーザー prin_kemkemprin_kemkem
提出日時 2023-05-11 21:44:05
言語 PyPy3
(7.3.15)
結果
TLE  
実行時間 -
コード長 3,305 bytes
コンパイル時間 153 ms
コンパイル使用メモリ 82,048 KB
実行使用メモリ 795,372 KB
最終ジャッジ日時 2024-05-05 18:01:14
合計ジャッジ時間 6,664 ms
ジャッジサーバーID
(参考情報)
judge5 / judge1
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 94 ms
79,616 KB
testcase_01 AC 96 ms
80,256 KB
testcase_02 AC 95 ms
79,488 KB
testcase_03 AC 971 ms
391,756 KB
testcase_04 AC 97 ms
79,744 KB
testcase_05 AC 102 ms
79,744 KB
testcase_06 AC 97 ms
80,000 KB
testcase_07 AC 105 ms
79,360 KB
testcase_08 AC 97 ms
80,128 KB
testcase_09 AC 94 ms
79,616 KB
testcase_10 AC 95 ms
79,872 KB
testcase_11 TLE -
testcase_12 AC 174 ms
81,920 KB
testcase_13 AC 176 ms
80,768 KB
testcase_14 AC 157 ms
81,664 KB
testcase_15 AC 177 ms
82,660 KB
testcase_16 AC 1,259 ms
418,152 KB
testcase_17 AC 1,211 ms
369,072 KB
testcase_18 AC 1,319 ms
414,656 KB
testcase_19 AC 225 ms
82,936 KB
testcase_20 AC 226 ms
82,936 KB
testcase_21 AC 210 ms
82,232 KB
testcase_22 AC 224 ms
83,308 KB
testcase_23 AC 219 ms
83,848 KB
testcase_24 AC 219 ms
83,340 KB
testcase_25 AC 224 ms
83,884 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

from collections import defaultdict, deque, Counter
import copy
from itertools import combinations, permutations, product, accumulate, groupby
from heapq import heapify, heappop, heappush
import math
import bisect
from pprint import pprint
import sys
# sys.setrecursionlimit(700000)
input = lambda: sys.stdin.readline().rstrip('\n')
inf = float('inf')
mod1 = 10**9+7
mod2 = 998244353
def ceil_div(x, y): return -(-x//y)

#################################################

def sccd(adj, radj):
    n = len(adj)
    been = [False]*n
    P = []
    for s in range(n):
        if been[s]: continue
        stack = [s]
        while stack:
            now = stack.pop()
            if now >= 0:
                if been[now]: continue
                been[now] = True
                stack.append(~now)
                for nxt in adj[now]:
                    if been[nxt]: continue
                    stack.append(nxt)
            else:
                P.append(~now)
    scc_idx = [None]*n
    idx = 0
    for s in reversed(P):
        if not been[s]: continue
        been[s] = False
        stack = [s]
        while stack:
            now = stack.pop()
            scc_idx[now] = idx
            for nxt in radj[now]:
                if not been[nxt]: continue
                been[nxt] = False
                stack.append(nxt)
        idx += 1
    return scc_idx

class Two_SAT:
    def __init__(self, n) -> None:
        self.n = n
        self.adj = [[] for _ in range(2*n)]
        self.radj = [[] for _ in range(2*n)]
    def add(self, x, y): # 否定したいときは~xを入れる
        if x >= 0 and y >= 0:
            self.adj[self.n+x].append(y)
            self.radj[y].append(self.n+x)
            self.adj[self.n+y].append(x)
            self.radj[x].append(self.n+y)
        elif x >= 0:
            y = ~y
            self.adj[self.n+x].append(self.n+y)
            self.radj[self.n+y].append(self.n+x)
            self.adj[y].append(x)
            self.radj[x].append(y)
        elif y >= 0:
            x = ~x
            self.adj[x].append(y)
            self.radj[y].append(x)
            self.adj[self.n+y].append(self.n+x)
            self.radj[self.n+x].append(self.n+y)
        else:
            x = ~x; y = ~y
            self.adj[x].append(self.n+y)
            self.radj[self.n+y].append(x)
            self.adj[y].append(self.n+x)
            self.radj[self.n+x].append(y)
    def solve(self):
        scc_idx = sccd(self.adj, self.radj)
        ret = [False]*self.n
        for x in range(self.n):
            i, j = scc_idx[x], scc_idx[self.n+x]
            if i == j:
                return None
            ret[x] = i > j
        return ret

def is_intersect(li, ri, lj, rj):
    if li > lj: li, ri, lj, rj = ri, rj, li, lj
    return lj <= ri

N, M = map(int, input().split())
blocks = [tuple(map(int, input().split())) for _ in range(N)]
sat = Two_SAT(N)
for i in range(N):
    li, ri = blocks[i]
    for j in range(i+1, N):
        lj, rj = blocks[j]
        if is_intersect(li, ri, lj, rj): sat.add(~i, ~j)
        if is_intersect(li, ri, M-1-rj, M-1-lj): sat.add(~i, j)
        if is_intersect(M-1-ri, M-1-li, lj, rj): sat.add(i, ~j)
        if is_intersect(M-1-ri, M-1-li, M-1-rj, M-1-lj): sat.add(i, j)
del blocks
ans = sat.solve()
print("YNEOS"[ans is None::2])
0